1 /* 2 * Copyright © 2010 Codethink Limited 3 * 4 * This library is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Lesser General Public 6 * License as published by the Free Software Foundation; either 7 * version 2.1 of the License, or (at your option) any later version. 8 * 9 * This library is distributed in the hope that it will be useful, but 10 * WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * Lesser General Public License for more details. 13 * 14 * You should have received a copy of the GNU Lesser General Public 15 * License along with this library; if not, see <http://www.gnu.org/licenses/>. 16 * 17 * Author: Ryan Lortie <desrt@desrt.ca> 18 */ 19 20 #ifndef __G_TIME_ZONE_H__ 21 #define __G_TIME_ZONE_H__ 22 23 #if !defined (__GLIB_H_INSIDE__) && !defined (GLIB_COMPILATION) 24 #error "Only <glib.h> can be included directly." 25 #endif 26 27 #include <glib/gtypes.h> 28 29 G_BEGIN_DECLS 30 31 typedef struct _GTimeZone GTimeZone; 32 33 /** 34 * GTimeType: 35 * @G_TIME_TYPE_STANDARD: the time is in local standard time 36 * @G_TIME_TYPE_DAYLIGHT: the time is in local daylight time 37 * @G_TIME_TYPE_UNIVERSAL: the time is in UTC 38 * 39 * Disambiguates a given time in two ways. 40 * 41 * First, specifies if the given time is in universal or local time. 42 * 43 * Second, if the time is in local time, specifies if it is local 44 * standard time or local daylight time. This is important for the case 45 * where the same local time occurs twice (during daylight savings time 46 * transitions, for example). 47 */ 48 typedef enum 49 { 50 G_TIME_TYPE_STANDARD, 51 G_TIME_TYPE_DAYLIGHT, 52 G_TIME_TYPE_UNIVERSAL 53 } GTimeType; 54 55 GLIB_AVAILABLE_IN_ALL 56 GTimeZone * g_time_zone_new (const gchar *identifier); 57 GLIB_AVAILABLE_IN_ALL 58 GTimeZone * g_time_zone_new_utc (void); 59 GLIB_AVAILABLE_IN_ALL 60 GTimeZone * g_time_zone_new_local (void); 61 GLIB_AVAILABLE_IN_2_58 62 GTimeZone * g_time_zone_new_offset (gint32 seconds); 63 64 GLIB_AVAILABLE_IN_ALL 65 GTimeZone * g_time_zone_ref (GTimeZone *tz); 66 GLIB_AVAILABLE_IN_ALL 67 void g_time_zone_unref (GTimeZone *tz); 68 69 GLIB_AVAILABLE_IN_ALL 70 gint g_time_zone_find_interval (GTimeZone *tz, 71 GTimeType type, 72 gint64 time_); 73 74 GLIB_AVAILABLE_IN_ALL 75 gint g_time_zone_adjust_time (GTimeZone *tz, 76 GTimeType type, 77 gint64 *time_); 78 79 GLIB_AVAILABLE_IN_ALL 80 const gchar * g_time_zone_get_abbreviation (GTimeZone *tz, 81 gint interval); 82 GLIB_AVAILABLE_IN_ALL 83 gint32 g_time_zone_get_offset (GTimeZone *tz, 84 gint interval); 85 GLIB_AVAILABLE_IN_ALL 86 gboolean g_time_zone_is_dst (GTimeZone *tz, 87 gint interval); 88 GLIB_AVAILABLE_IN_2_58 89 const gchar * g_time_zone_get_identifier (GTimeZone *tz); 90 91 G_END_DECLS 92 93 #endif /* __G_TIME_ZONE_H__ */ 94